It is quite common for iPhones seized by Police to have pictures of the criminals standing in front of large marijuana plantations they have set up in remote bush locations.

These guys would often be arrested on unrelated matters, the phones would be examined and these nice photos would be checked for geo data which we could plot into google maps then forward the information to the local detectives to go and do what they needed to do.

This was also very common for guys smoking and using drugs inside their own homes. With the amazing accuracy of the GPS data on iPhones it was often enough to get search warrants for houses as well.